Question

name: alan martinez period: 9/25/15 the epic periodic table scavenger hunt! instructions: using only your periodic table as your
oad - map,\ answer the following questions!! 1. i have an atomic mass of 108. who am i? 2. i have 28 electrons and a charge of 2+. who am i? 3. how many neutrons does ruthenium have? 4. i have an atomic number of 56. who am i? 5. i am an alkali metal in the period 2. who am i? 6. which has more neutrons: cobalt or nickel? (show all your work below) 7. indium has a charge of - 3. how many protons and how many electrons does it have? # of protons: ______ # of electrons: ____ 8. which element on the periodic table has the largest number of protons? 9. name two elements that have the same (rounded) atomic mass: ____ 10. how many neutrons does astatine have? 11. write the average atomic mass (rounded) of tantalum: ______ 12. which neutral element has 89 electrons? (this might take a little while! ☺) 13. i am named after the russian scientist who organized the periodic table by atomic mass. who am i? 14. which element has a charge of - 3 as an anion, and has 86 electrons? 15. give the shorthand notation for aluminum: 16. how many elements have a symbol that starts with the letter \z\? 17. i am an element that is 10 times the mass of helium. who am i?

Explanation:

Step1: Find element with atomic mass 108

Silver (Ag) has an atomic mass of approximately 108.

Step2: Determine element with 28 electrons and 2+ charge

A neutral atom has equal number of protons and electrons. If an ion has 28 electrons and a 2+ charge, the neutral - atom has 30 electrons (and protons). Zinc (Zn) has an atomic number of 30.

Step3: Calculate neutrons in Ruthenium

Ruthenium (Ru) has an atomic number (Z) of 44 and an average atomic mass (A) of approximately 101. Neutrons (N)=A - Z. So, N = 101 - 44=57.

Step4: Identify element with atomic number 56

Barium (Ba) has an atomic number of 56.

Step5: Find alkali metal in period 2

Lithium (Li) is the alkali metal in period 2.

Step6: Compare neutrons in Cobalt and Nickel

Cobalt (Co) has an atomic number of 27 and an average atomic mass of approximately 59. Neutrons in Co = 59 - 27 = 32. Nickel (Ni) has an atomic number of 28 and an average atomic mass of approximately 59. Neutrons in Ni = 59 - 28 = 31. So, Cobalt has more neutrons.

Step7: Determine protons and electrons in Indium with - 3 charge

Indium (In) has an atomic number of 49, so number of protons = 49. If it has a - 3 charge, number of electrons=49 + 3=52.

Step8: Find element with largest number of protons

Oganesson (Og) has the highest atomic number (118) among known elements, so it has the largest number of protons.

Step9: Name elements with same rounded atomic mass

Carbon (C) with atomic mass approximately 12 and Boron - 12 (an isotope of Boron) can have the same rounded atomic mass (in some cases, other pairs may also exist).

Step10: Calculate neutrons in Astatine

Astatine (At) has an atomic number of 85 and an average atomic mass of approximately 210. Neutrons = 210 - 85 = 125.

Step11: Write average atomic mass of Tantalum

Tantalum (Ta) has an average atomic mass of approximately 181.

Step12: Identify neutral element with 89 electrons

A neutral element has equal number of electrons and protons. Actinium (Ac) has an atomic number of 89.

Step13: Name element named after Mendeleev

Mendelevium (Md) is named after Dmitri Mendeleev.

Step14: Determine element with - 3 charge and 86 electrons

If an ion has 86 electrons and a - 3 charge, the neutral atom has 83 electrons (and protons). Bismuth (Bi) has an atomic number of 83.

Step15: Write shorthand notation for Aluminum

The shorthand electron - configuration for Aluminum (Al) is [Ne]3s²3p¹.

Step16: Count elements with symbol starting with 'Z'

Zinc (Zn) and Zirconium (Zr) are the two elements with symbols starting with 'Z'.

Step17: Find element 10 times mass of Helium

Helium (He) has an atomic mass of approximately 4. An element 10 times its mass has a mass of approximately 40. Calcium (Ca) has an average atomic mass of approximately 40.

Answer:

1. Silver (Ag)
2. Zinc (Zn)
3. 57
4. Barium (Ba)
5. Lithium (Li)
6. Cobalt has more neutrons.
7. # of protons: 49; # of electrons: 52
8. Oganesson (Og)
9. Carbon and Boron - 12 (example pair)
10. 125
11. 181
12. Actinium (Ac)
13. Mendelevium (Md)
14. Bismuth (Bi)
15. [Ne]3s²3p¹
16. 2
17. Calcium (Ca)